Joe Biden’s campaign bought ads in swing states tomorrow during Chris Wallace’s feisty “Fox News Sunday” interview with President Trump.

What he’s saying: The minute-long ad, “Tough,” will air in the major markets in the six core swing states — Michigan, Wisconsin, Pennsylvania, Arizona, Florida and North Carolina.

“I will not abandon you,” Biden says in the ad. “We’re all in this together. We’ll fight this together. And, together, we’ll emerge from this stronger than we were before we began.”

Between the lines: The ad never mentions Trump’s name, but the intention is a stark, dramatic contrast in approach to the virus (“Wear a mask. Wash your hands”), laced with a positive, hopeful message.